A scheduled appearance by fired White House aide Oliver L. North has been canceled because of poor ticket sales, promoters said today. Only 400 tickets were sold for Saturday's appearance, said attorney Rusty Johnston, chairman of the Mobile County Republican Committee and head of the "South Loves North" committee.

What a wonderful country this is! Members of Congress and private citizens alike are demonstrating their God-given right to express their opinions regarding the Iran arms scandal. These self-proclaimed patriots are now publicly showing their support for Lt. Col. Oliver L. North by offering to contribute to a fund for his defense. I have just one question: Where can I send my contribution for his prosecution? MATTHEW B. TEPPER Los Angeles

Oliver L. North's conviction on the charge of concealing and destroying White House records and documents means he will lose his monthly military retirement pay of about $1,900, the Marine Corps said Thursday. In fact, the jury's guilty verdict on that charge means that North may no longer identify himself as retired Lt. Col. Oliver North.

Oliver L. North, who blames his 1994 U.S. Senate defeat on opposition from Sen. John W. Warner (R-Va.), urged Republicans to oust Warner in a June 11 GOP primary. North told delegates to the Republican state convention in Salem, Va., to vote for challenger James C. Miller III, a former Reagan administration budget director who lost the Senate nomination to North two years ago.

A federal judge dropped two of the nine criminal counts against Clair E. George, the former chief of CIA covert operations who faces a retrial next week in an Iran-Contra case. George originally was charged with covering up White House aide Oliver L. North's secret Contra resupply network and concealing his knowledge of the Ronald Reagan White House's arms sales to Iran. He remains charged with four counts of false statements, two perjury counts and one count of obstructing the grand jury.

A Boston bank has been ordered by the special congressional investigative committees to provide records of an account in the name of former White House aide Oliver L. North, a Boston television station reported Friday. WCVB quoted an unidentified source on the joint Senate and House committees probing the Iran- contra affair as saying the State Street Bank has at least one account in the name of the Marine lieutenant colonel.